From: Trond Myklebust <trond.myklebust@fys.uio.no>
Subject: Re: oops in FC1 update kernel, in refile_inode
Date: Mon, 26 Apr 2004 17:56:32 -0400
Sender: nfs-admin@lists.sourceforge.net
Message-ID: <1083016592.15282.107.camel@lade.trondhjem.org>
References: <408D7E8E.7040801@collab.net>
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Cc: nfs@lists.sourceforge.net
To: Andrew Ryan <andrewr@collab.net>
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On Mon, 2004-04-26 at 17:26, Andrew Ryan wrote:
> I realize that this list is the wrong place to go for Fedora/RH support, 
> but we're having a unpleasant problem and I'm hoping someone here could 
> shed some light on it. We're running load tests on Subversion with 
> repositories on NFS-mounted filesystems, and getting reliable oops'es 
> after a few hours-days of testing. With the repos on local disk, no 
> oops, and the tests complete normally. For all I know, the bug has 
> nothing to do with NFS, but there seems to be a correlation.
> 
> I filed a RH bugzilla issue today, which has a decoded oops, SysRq+T 
> output, and vmstat output for the period preceding the crash.
> https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=121732
> 
> The hardware is dual Xeon 3.0GHz, running hyperthreading, kernel
> 2.4.22-1.2179.nptlsmp. The mount options in use are:
> rw,tcp,nfsvers=3,rsize=32768,wsize=32768,intr
> The NFS server is a NetApp. Both NFS client and server are running at
> 100Mb switched ethernet.
> 
> In the 2.4.26 kernel's Changelog
> (http://kernel.org/pub/linux/kernel/v2.4/ChangeLog-2.4.26) I saw
> mention of a refile_inode bug fixed by Trond, which made me think
> perhaps this is what is affecting us, but I don't know. I'm all for 
> trying out pretty much any patch which might help us.

That is indeed a fix for a generic VFS/mm race. It has pretty much
nothing to do with NFS itself but just happened to trigger on an NFS
partition for someone.
As far as I can see, that patch hasn't yet been applied to the latest
errata kernel (linux-2.4.22-1.2188.nptl). Have you tried it out to see
if it fixes your Oops?

Steve, could you make sure that patch makes it into any future errata
kernels?

Cheers,
  Trond


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